[SCSI] Fix sense key MEDIUM ERROR processing and retry
1) If the device reports an uncorrectable MEDIUM ERROR, such as SK MEDIUM ERROR, ASC UNRECOVERED READ ERR, AMNF DATA FIELD or RECORD NOT FOUND, then: In scsi_check_sense() return SUCCESS so as to not retry -- the error is uncorrectable -- this speeds up total processing time. Signed-off-by: NLuben Tuikov <ltuikov@yahoo.com> Extracted the MEDIUM ERROR piece and Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>
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